Evolution of cassava (Manihot esculenta Crantz) after recent introduction into a South Pacific Island system: the contribution of sex to the diversification of a clonally propagated crop.
Cassava (Manihot esculenta Crantz) is a clonally propagated crop that was introduced into the South Pacific archipelago of Vanuatu in the 1850s. Based on a survey conducted in 10 different villages throughout the archipelago, we present here a study of its diversity. Farmers' knowledge about cultivation cycle and sexual reproduction of cassava was recorded during group interviews in each village. Using a set of 11 SSR markers, we genotyped the 104 landraces collected and 60 supplementary accessions from a within-landrace study (12 landraces x 5 plants). Out of the 104 landraces collected, we discovered 77 different multilocus genotypes and the within-landrace study identified several polyclonal landraces. Our data suggest a number of hypotheses about the dynamics of diversity of cassava in Vanuatu.
Sardos
J
J
CIRAD, UMR DAP 1098, Montpellier, F-34398 France. julie.sardos@cirad.fr
McKey
D
D
Duval
M F
MF
Malapa
R
R
Noyer
J L
JL
Lebot
V
V
D001947:Breeding; D018744:DNA, Plant / Q000235:genetics; D019143:Evolution, Molecular; D014644:Genetic Variation; D002365:Manihot / Q000145:classification / Q000235:genetics*; D018598:Minisatellite Repeats; D010802:Phylogeny; D012098:Reproduction / Q000235:genetics; D009514:Vanuatu
D018744:DNA, Plant